Biosensor Insertion Device With Single-Action Automatic Retraction

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Solution Overview

Problem

Conventional insertion devices for biosensors require a two-action operation, where failure to release the plunger can result in the piercing member remaining inserted, causing discomfort to the host.

Innovation Solution

An insertion device with a cover body and an insertion module that includes pre-compressed elastic members, allowing for automatic insertion and retraction operations through a single-action mechanism, utilizing a first elastic member for insertion and a second elastic member for retraction, with limiting structures to control the movement of the insertion seat and retraction seat.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a two-action operation is used for insertion and retraction, then the piercing member can be securely controlled, but the operation becomes complex and time-consuming

Engineering Contradiction:

Improveoperation simplicityVSAvoidoperation steps

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines the insertion and retraction operations into a single continuous action. The plunger structure integrates both functions: when pressed, it simultaneously drives the piercing member into the host and then automatically retracts it after a predetermined time, eliminating the need for separate insertion and retraction actions.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The device incorporates a predetermined time mechanism that automatically triggers retraction after the insertion is complete. This preliminary programming of the retraction timing allows the system to execute the second action (retraction) automatically without requiring user intervention, effectively reducing the operational complexity.

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If the plunger is not released promptly, then the piercing member remains inserted causing discomfort, but rapid release is difficult to ensure for all users

Engineering Contradiction:

Improvehost discomfortVSAvoiduser skill requirement

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The device performs the retraction function automatically based on a predetermined time interval. After insertion, the system self-manages the retraction process without requiring the user to remember or execute the release action. This eliminates the harmful effect of prolonged insertion while removing the skill requirement for timely release.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The plunger is designed with an automatic retraction mechanism that operates after a predetermined period. This periodic action ensures that regardless of user attention or skill level, the piercing member will be retracted at the appropriate time, preventing discomfort while maintaining operational simplicity.

Inventive Principle:

Principle #19Periodic action

3Reliability

If automatic retraction is implemented, then user error is eliminated, but the device complexity increases

Engineering Contradiction:

Improveretraction timingVSAvoidmechanism structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The device incorporates a predetermined time mechanism that is pre-set during manufacturing. This preliminary programming of the retraction timing ensures reliable and consistent operation without requiring complex control systems. The reliability is achieved through simple, pre-determined timing rather than complex real-time control.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The plunger is divided into functionally distinct segments: an insertion portion that drives the piercing member forward, and a retraction portion that automatically pulls it back after the predetermined time. This segmentation allows each part to perform its specific function reliably while keeping the overall mechanism relatively simple and manageable.

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables rapid and comfortable insertion and retraction of biosensors with a single-action operation, reducing the duration to less than 100 milliseconds, minimizing discomfort and ensuring smooth operation by any user.

Implementation Method 1

a first pre-compressed elastic member having two opposite ends that respectively abut against the insertion seat and the cover body

Methodology Applied

Scientific EffectElastic potential energy: Elasticity

Implementation Method 2

a second pre-compressed elastic member having two opposite ends that respectively abut against the insertion seat and the retraction seat

Methodology Applied

Scientific EffectElastic potential energy: Elasticity

Data Source

PatentUS12403260B2Insertion device for a biosensor and insertion method thereof

Publication Date: 2025.09.02 BIONIME

AI summary

An insertion device includes a cover body, an insertion module. The insertion module is disposed in the cover body, and includes a main body, an insertion seat, a first elastic member, a retraction seat and a second elastic member. When the cover body is depressed, the insertion seat is driven by the first elastic member to perform an automatic-insertion operation and to collapse a limiting structure between the insertion seat and the cover body. A limiting structure between the insertion seat and the retraction seat collapses upon the collapse of the limiting structure between the insertion seat and the cover body, so that the retraction seat is driven by the second elastic member to perform an automatic-retraction operation.